Question

Classify each of the following as being either a p-type or an n-type semiconductor:

 (i) Ge doped with In

(ii) B doped with Si.

Answer 1

(i) Ge (a group 14 element) is doped with In (a group 13 element). Therefore, a hole will be created and the semiconductor generated will be a p-type semiconductor.

 (ii) B (a group 13 element) is doped with Si (a group 14 element). So, there will be an extra electron and the semiconductor generated will be an n-type semiconductor.